to occur, there should be interaction between the sperm & ovum.
And as both of you never had sexual intercourse, there is no chance of your partner getting pregnant just with foreplay.
Moreover, the presence of periods also rules out pregnancy.
The concern in this case is regarding the irregular periods
in your partner.
Causes can be many such as hormonal
imbalance, anovulatory cycles, stress, any infection or pathology in the uterus, ovary, etc.
So, it will be better to consult a Gynecologist & get a proper clinical examination done.
Investigations like complete blood count
scan of abdomen and pelvis will be helpful to rule out any pathological cause.
Wishing a good health.